Unanswered: Map crashes on Nexus 7 while pinching

Hi there,

if I rapidly pinch to zoom a map on Nexus 7 (4.2.1) I get a strange behaviour.
No error is thrown, but I can no longer grab the tap event in sencha.
The back button still takes on the pressed state, but the controller no longer takes the tap event to do something.

I can press the hardware back button (which gets the normal back button method through Cordova).
But the back button inside my view, does not work.

So - I guess there are way too many map events fired, bu tso far, it all seems to be within a limit.
Any idea?